[llvm] [AMDGPU][GlobalISel] Reduce instruction count for store in global addrspace for non-powers-of-2 (PR #206043)

[Rajveer Singh Bharadwaj via llvm-commits]

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Rajveer100 wrote:

This won't work, it throws a legalizer error since G_SUBVECTOR_EXTRACT doesn't work for non powers of two.

https://github.com/llvm/llvm-project/pull/206043